A friend of mine uses one on his j/109 after an expensive experience with his 
sail-drive. He clips the zinc "fish" to his backstay which I presume is 
grounded to the engine block. 

His boat was never at a dock, and he has not had a problem since (3+ years) but 
I understand that there are so many factors involved in electrolysis that we 
don't know if it was the fish working or some other change - perhaps on other 
boats nearby in the mooring field (fore and aft moorings so other boats are 
close!)

--
Jonathan
Indigo C&C 35III
SOUTHPORT CT

> On Sep 25, 2017, at 14:08, Alan Liles via CnC-List <cnc-list@cnc-list.com> 
> wrote:
> 
> Where do you connect overboard zincs? I would think directly to the shaft or 
> engine but the ones I've seen don't have a cable long enough for that. 
> 
> Cheers, Al
> 
> 
>> On Sep 25, 2017, at 10:44 AM, Bill Dakin via CnC-List 
>> <cnc-list@cnc-list.com> wrote:
>> 
>> Overboard zincs make a lot of sense.  Great surface area for consumption, 
>> fast inspection and stowed quickly before leaving dock.
>> Bill Dakin
>> S/V Tapestry
>> 25MKII
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